[Xen-devel] [PATCH 3/4] exec, memory: Call to xen_modified_memory.

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

This patch add some calls to xen_modified_memory to notify Xen about dirtybits
during migration.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 exec.c   |    4 ++++
 memory.c |    2 ++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/exec.c b/exec.c
index c9fa17d..9f7a4f7 100644
--- a/exec.c
+++ b/exec.c
@@ -3438,6 +3438,7 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, 
uint8_t *buf,
                     cpu_physical_memory_set_dirty_flags(
                         addr1, (0xff & ~CODE_DIRTY_FLAG));
                 }
+                xen_modified_memory(addr1, TARGET_PAGE_SIZE);
                 qemu_put_ram_ptr(ptr);
             }
         } else {
@@ -3623,6 +3624,7 @@ void cpu_physical_memory_unmap(void *buffer, 
target_phys_addr_t len,
     if (buffer != bounce.buffer) {
         if (is_write) {
             ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer);
+            xen_modified_memory(addr1, access_len);
             while (access_len) {
                 unsigned l;
                 l = TARGET_PAGE_SIZE;
@@ -3947,6 +3949,7 @@ static inline void stl_phys_internal(target_phys_addr_t 
addr, uint32_t val,
             cpu_physical_memory_set_dirty_flags(addr1,
                 (0xff & ~CODE_DIRTY_FLAG));
         }
+        xen_modified_memory(addr1, 4);
     }
 }
 
@@ -4020,6 +4023,7 @@ static inline void stw_phys_internal(target_phys_addr_t 
addr, uint32_t val,
             cpu_physical_memory_set_dirty_flags(addr1,
                 (0xff & ~CODE_DIRTY_FLAG));
         }
+        xen_modified_memory(addr1, 2);
     }
 }
 
diff --git a/memory.c b/memory.c
index aab4a31..4d004e2 100644
--- a/memory.c
+++ b/memory.c
@@ -19,6 +19,7 @@
 #include "bitops.h"
 #include "kvm.h"
 #include <assert.h>
+#include "hw/xen.h"
 
 #define WANT_EXEC_OBSOLETE
 #include "exec-obsolete.h"
@@ -1085,6 +1086,7 @@ void memory_region_set_dirty(MemoryRegion *mr, 
target_phys_addr_t addr,
                              target_phys_addr_t size)
 {
     assert(mr->terminates);
+    xen_modified_memory(mr->ram_addr + addr, size);
     return cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
 }
 
-- 
Anthony PERARD


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